US7113604B2 - Apparatus and method for matching the response of microphones in magnitude and phase - Google Patents
Apparatus and method for matching the response of microphones in magnitude and phase Download PDFInfo
- Publication number
- US7113604B2 US7113604B2 US10/425,143 US42514303A US7113604B2 US 7113604 B2 US7113604 B2 US 7113604B2 US 42514303 A US42514303 A US 42514303A US 7113604 B2 US7113604 B2 US 7113604B2
- Authority
- US
- United States
- Prior art keywords
- output
- microphone
- circuit
- microphones
- rolloff
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/40—Arrangements for obtaining a desired directivity characteristic
- H04R25/407—Circuits for combining signals of a plurality of transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/004—Monitoring arrangements; Testing arrangements for microphones
- H04R29/005—Microphone arrays
- H04R29/006—Microphone matching
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
Abstract
Description
M(ω)=M 0 L(ω)H(ω)
where
-
- L(ω) models the low frequency rolloff, and
- H(ω) models the mid and high frequency behavior, including the diaphragm resonance.
where ωl is the corner frequency for the low frequency rolloff. The higher frequency behavior is approximated by:
where ωr is the corner diaphragm resonance frequency and Q is the mechanical quality factor of that resonance.
M(ω)=M 0 L(ω)H(ω).
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/425,143 US7113604B2 (en) | 1998-08-25 | 2003-04-29 | Apparatus and method for matching the response of microphones in magnitude and phase |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9792698P | 1998-08-25 | 1998-08-25 | |
US09/193,012 US6654468B1 (en) | 1998-08-25 | 1998-11-16 | Apparatus and method for matching the response of microphones in magnitude and phase |
US10/425,143 US7113604B2 (en) | 1998-08-25 | 2003-04-29 | Apparatus and method for matching the response of microphones in magnitude and phase |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/193,012 Division US6654468B1 (en) | 1998-08-25 | 1998-11-16 | Apparatus and method for matching the response of microphones in magnitude and phase |
Publications (2)
Publication Number | Publication Date |
---|---|
US20030198356A1 US20030198356A1 (en) | 2003-10-23 |
US7113604B2 true US7113604B2 (en) | 2006-09-26 |
Family
ID=26793792
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/193,012 Expired - Lifetime US6654468B1 (en) | 1998-08-25 | 1998-11-16 | Apparatus and method for matching the response of microphones in magnitude and phase |
US10/425,143 Expired - Fee Related US7113604B2 (en) | 1998-08-25 | 2003-04-29 | Apparatus and method for matching the response of microphones in magnitude and phase |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/193,012 Expired - Lifetime US6654468B1 (en) | 1998-08-25 | 1998-11-16 | Apparatus and method for matching the response of microphones in magnitude and phase |
Country Status (4)
Country | Link |
---|---|
US (2) | US6654468B1 (en) |
EP (1) | EP0982971B1 (en) |
DE (1) | DE69933627T2 (en) |
DK (1) | DK0982971T3 (en) |
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US20070258597A1 (en) * | 2004-08-24 | 2007-11-08 | Oticon A/S | Low Frequency Phase Matching for Microphones |
US20080152167A1 (en) * | 2006-12-22 | 2008-06-26 | Step Communications Corporation | Near-field vector signal enhancement |
US20080208538A1 (en) * | 2007-02-26 | 2008-08-28 | Qualcomm Incorporated | Systems, methods, and apparatus for signal separation |
US20090022336A1 (en) * | 2007-02-26 | 2009-01-22 | Qualcomm Incorporated | Systems, methods, and apparatus for signal separation |
US20090164212A1 (en) * | 2007-12-19 | 2009-06-25 | Qualcomm Incorporated | Systems, methods, and apparatus for multi-microphone based speech enhancement |
US20090254338A1 (en) * | 2006-03-01 | 2009-10-08 | Qualcomm Incorporated | System and method for generating a separated signal |
US20090299739A1 (en) * | 2008-06-02 | 2009-12-03 | Qualcomm Incorporated | Systems, methods, and apparatus for multichannel signal balancing |
US20100054509A1 (en) * | 2008-08-29 | 2010-03-04 | Thompson Stephen C | Methods and apparatus for reduced distortion balanced armature devices |
US20110069846A1 (en) * | 2009-09-21 | 2011-03-24 | Mediatek Inc. | Audio processing methods and apparatuses utilizing the same |
US10616691B2 (en) | 2015-11-12 | 2020-04-07 | Knowles Electronics, Llc | Method and apparatus to increase audio band microphone sensitivity |
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US6741714B2 (en) | 2000-10-04 | 2004-05-25 | Widex A/S | Hearing aid with adaptive matching of input transducers |
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WO2004103015A1 (en) | 2003-05-15 | 2004-11-25 | Oticon A/S | Microphone with adjustable properties |
DE10327890A1 (en) | 2003-06-20 | 2005-01-20 | Siemens Audiologische Technik Gmbh | Method for operating a hearing aid and hearing aid with a microphone system, in which different directional characteristics are adjustable |
US7424119B2 (en) * | 2003-08-29 | 2008-09-09 | Audio-Technica, U.S., Inc. | Voice matching system for audio transducers |
DE102004010867B3 (en) | 2004-03-05 | 2005-08-18 | Siemens Audiologische Technik Gmbh | Matching phases of microphones of hearing aid directional microphone involves matching second signal level to first by varying transition time of output signal from microphone without taking into account sound source position information |
US7688985B2 (en) * | 2004-04-30 | 2010-03-30 | Phonak Ag | Automatic microphone matching |
JP4643651B2 (en) * | 2004-10-19 | 2011-03-02 | ヴェーデクス・アクティーセルスカプ | Adaptive microphone matching system and method in hearing aids |
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US8620672B2 (en) * | 2009-06-09 | 2013-12-31 | Qualcomm Incorporated | Systems, methods, apparatus, and computer-readable media for phase-based processing of multichannel signal |
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US9648421B2 (en) | 2011-12-14 | 2017-05-09 | Harris Corporation | Systems and methods for matching gain levels of transducers |
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US10244333B2 (en) * | 2016-06-06 | 2019-03-26 | Starkey Laboratories, Inc. | Method and apparatus for improving speech intelligibility in hearing devices using remote microphone |
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Citations (12)
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US4412097A (en) * | 1980-01-28 | 1983-10-25 | Victor Company Of Japan, Ltd. | Variable-directivity microphone device |
US4420655A (en) | 1980-07-02 | 1983-12-13 | Nippon Gakki Seizo Kabushiki Kaisha | Circuit to compensate for deficit of output characteristics of a microphone by output characteristics of associated other microphones |
JPS5964994A (en) | 1982-10-05 | 1984-04-13 | Matsushita Electric Ind Co Ltd | Microphone device |
US4509022A (en) | 1982-03-01 | 1985-04-02 | U.S. Philips Corporation | Amplifier circuit with automatic gain control and hearing aid equipped with such a circuit |
US4622440A (en) | 1984-04-11 | 1986-11-11 | In Tech Systems Corp. | Differential hearing aid with programmable frequency response |
US4718099A (en) * | 1986-01-29 | 1988-01-05 | Telex Communications, Inc. | Automatic gain control for hearing aid |
EP0509742A2 (en) | 1991-04-18 | 1992-10-21 | Matsushita Electric Industrial Co., Ltd. | Microphone apparatus |
US5978490A (en) | 1996-12-27 | 1999-11-02 | Lg Electronics Inc. | Directivity controlling apparatus |
US6035049A (en) * | 1997-09-05 | 2000-03-07 | Information Storage Devices, Inc. | AC coupling and signal amplification using switched capacitors |
US6389142B1 (en) | 1996-12-11 | 2002-05-14 | Micro Ear Technology | In-the-ear hearing aid with directional microphone system |
US6421448B1 (en) * | 1999-04-26 | 2002-07-16 | Siemens Audiologische Technik Gmbh | Hearing aid with a directional microphone characteristic and method for producing same |
US6654468B1 (en) * | 1998-08-25 | 2003-11-25 | Knowles Electronics, Llc | Apparatus and method for matching the response of microphones in magnitude and phase |
-
1998
- 1998-11-16 US US09/193,012 patent/US6654468B1/en not_active Expired - Lifetime
-
1999
- 1999-08-20 EP EP99306623A patent/EP0982971B1/en not_active Expired - Lifetime
- 1999-08-20 DK DK99306623T patent/DK0982971T3/en active
- 1999-08-20 DE DE69933627T patent/DE69933627T2/en not_active Expired - Lifetime
-
2003
- 2003-04-29 US US10/425,143 patent/US7113604B2/en not_active Expired - Fee Related
Patent Citations (13)
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US4412097A (en) * | 1980-01-28 | 1983-10-25 | Victor Company Of Japan, Ltd. | Variable-directivity microphone device |
US4420655A (en) | 1980-07-02 | 1983-12-13 | Nippon Gakki Seizo Kabushiki Kaisha | Circuit to compensate for deficit of output characteristics of a microphone by output characteristics of associated other microphones |
US4509022A (en) | 1982-03-01 | 1985-04-02 | U.S. Philips Corporation | Amplifier circuit with automatic gain control and hearing aid equipped with such a circuit |
JPS5964994A (en) | 1982-10-05 | 1984-04-13 | Matsushita Electric Ind Co Ltd | Microphone device |
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US5978490A (en) | 1996-12-27 | 1999-11-02 | Lg Electronics Inc. | Directivity controlling apparatus |
US6035049A (en) * | 1997-09-05 | 2000-03-07 | Information Storage Devices, Inc. | AC coupling and signal amplification using switched capacitors |
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Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7471798B2 (en) * | 2000-09-29 | 2008-12-30 | Knowles Electronics, Llc | Microphone array having a second order directional pattern |
US20040022397A1 (en) * | 2000-09-29 | 2004-02-05 | Warren Daniel M. | Microphone array having a second order directional pattern |
US20070258597A1 (en) * | 2004-08-24 | 2007-11-08 | Oticon A/S | Low Frequency Phase Matching for Microphones |
US8898056B2 (en) | 2006-03-01 | 2014-11-25 | Qualcomm Incorporated | System and method for generating a separated signal by reordering frequency components |
US20090254338A1 (en) * | 2006-03-01 | 2009-10-08 | Qualcomm Incorporated | System and method for generating a separated signal |
US20080152167A1 (en) * | 2006-12-22 | 2008-06-26 | Step Communications Corporation | Near-field vector signal enhancement |
US8160273B2 (en) | 2007-02-26 | 2012-04-17 | Erik Visser | Systems, methods, and apparatus for signal separation using data driven techniques |
US20080208538A1 (en) * | 2007-02-26 | 2008-08-28 | Qualcomm Incorporated | Systems, methods, and apparatus for signal separation |
US20090022336A1 (en) * | 2007-02-26 | 2009-01-22 | Qualcomm Incorporated | Systems, methods, and apparatus for signal separation |
US8175291B2 (en) | 2007-12-19 | 2012-05-08 | Qualcomm Incorporated | Systems, methods, and apparatus for multi-microphone based speech enhancement |
US20090164212A1 (en) * | 2007-12-19 | 2009-06-25 | Qualcomm Incorporated | Systems, methods, and apparatus for multi-microphone based speech enhancement |
US20090299739A1 (en) * | 2008-06-02 | 2009-12-03 | Qualcomm Incorporated | Systems, methods, and apparatus for multichannel signal balancing |
US8321214B2 (en) | 2008-06-02 | 2012-11-27 | Qualcomm Incorporated | Systems, methods, and apparatus for multichannel signal amplitude balancing |
US20100054509A1 (en) * | 2008-08-29 | 2010-03-04 | Thompson Stephen C | Methods and apparatus for reduced distortion balanced armature devices |
US8385583B2 (en) | 2008-08-29 | 2013-02-26 | The Penn State Research Foundation | Methods and apparatus for reduced distortion balanced armature devices |
US20110069846A1 (en) * | 2009-09-21 | 2011-03-24 | Mediatek Inc. | Audio processing methods and apparatuses utilizing the same |
US8731210B2 (en) * | 2009-09-21 | 2014-05-20 | Mediatek Inc. | Audio processing methods and apparatuses utilizing the same |
US10616691B2 (en) | 2015-11-12 | 2020-04-07 | Knowles Electronics, Llc | Method and apparatus to increase audio band microphone sensitivity |
Also Published As
Publication number | Publication date |
---|---|
DE69933627T2 (en) | 2007-08-23 |
DE69933627D1 (en) | 2006-11-30 |
EP0982971A3 (en) | 2001-04-18 |
US20030198356A1 (en) | 2003-10-23 |
EP0982971A2 (en) | 2000-03-01 |
DK0982971T3 (en) | 2007-01-08 |
EP0982971B1 (en) | 2006-10-18 |
US6654468B1 (en) | 2003-11-25 |
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